Cable tray manufacturers talk about the reasons for the aging of cable tray skin?

1、绝缘受潮状况。一般这样的状况也相对常见，一般发生在直埋或排管里的电缆接头处。比方：电缆桥架接头制造不合格和在湿润的气候条件下做接头，会使接头进水或混入水蒸气，在电场效果下构成水树枝，逐渐危害电缆的绝缘强度而构成缺点。

1. Damp condition of insulation. Generally, this kind of situation is relatively common, which usually occurs at the cable joint in the directly buried or arranged pipe. For example: the unqualified manufacture of cable tray joint and making joint in humid climate will make the joint enter water or mix with water vapor, which will form water branch under the effect of electric field, and gradually endanger the insulation strength of the cable.

2、化工原料的腐蚀。电缆桥架直接埋在有酸碱效果的区域，往往会构成电缆的铠装、铅皮或外护层被腐蚀，保护层因长期遭受化学腐蚀或电解腐蚀，致使保护层失效，绝缘下降，也会导致电缆缺点。

2. Corrosion of chemical raw materials. When the cable tray is directly buried in the area with acid-base effect, the armor, lead skin or outer protective layer of the cable will be corroded. Due to long-term chemical corrosion or electrolytic corrosion of the protective layer, the protective layer will fail and the insulation will decline, which will also lead to the defects of the cable.

3、长期过负荷作业。超负荷作业，因为电流的热效应，负载电流通过电缆时必定导致导体发热，一同电荷的集肤效应以及钢铠的涡流损耗、绝缘介质损耗也会产乍附加热量，然后使电缆温度升高。长期超负荷作业时，过高的温度会加速绝缘的老化，致使绝缘被击穿。尤其在火热的夏天，电缆的温升常常导致电缆绝缘单薄处首要被击穿，因此在夏天，电缆的缺点也就特别多。

3. Long term overload operation. Overload operation, because of the thermal effect of the current, the load current through the cable must cause the conductor to heat, the skin effect of the same charge, the eddy current loss of the steel armor and the insulation medium loss will also produce additional heat, and then make the cable temperature rise. During long-term overload operation, too high temperature will accelerate the aging of insulation, resulting in breakdown of insulation. Especially in hot summer, the temperature rise of the cable often leads to the breakdown of the thin part of the cable insulation, so in summer, there are many disadvantages of the cable.

4、电缆接头缺点。桥架接头是电缆线路中单薄的环节，由人员直接差错(施工不良)引发的电缆接头缺点常常发生。施工人员在制造电缆接头过程中，如果有接头压接不紧、加热不充分等原网，都会导致电缆头绝缘下降，然后引发事端。

4. Disadvantages of cable joint. The bridge joint is a thin link in the cable line, and the defects of the cable joint caused by personnel's direct error (poor construction) often occur. In the process of making cable joints, if there are some original nets such as loose crimping and insufficient heating, the insulation of the cable head will drop, and then cause accidents.

5、环境以及温度要素。电缆桥架以及线缆周边的外界环境和热源也会构成电缆温度过高、绝缘击穿，严峻的构成爆破起火。

5. Environment and temperature elements. The external environment and heat source around the cable bridge and cable will also cause the cable temperature to be too high, insulation breakdown, and serious explosion and fire.

6、外力危害。其时的十分多的电缆缺点均以机械危害引起的居多。举个比方看：电缆敷设设备时不规范施工，简略构成机械危害;在直埋电缆上搞土建施工也简略将作业中的电缆危害等。有的状况下其时线缆的危害不严峻，或许需求几个月乃至几年才或许会呈现危害部位击穿构成缺点，还有的线缆损坏较重的或许发生短路缺点，直接影响电缆桥架和用电单位的出产日子中的问题。

6. External force is harmful. At that time, most of the cable defects were caused by mechanical hazards. For example: the cable laying equipment is not standardized construction, which simply constitutes a mechanical hazard; Civil engineering construction on directly buried cables will also reduce the cable hazards in operation. In some cases, the harm of the cable is not serious, and it may take several months or even years to present the defect of breakdown of the damaged parts. In some cases, the cable with serious damage may have the defect of short circuit, which directly affects the problems in the production days of the cable bridge and the power users.